renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-19 18:53:52 +08:00
Code

gianfar: Some cleanups for startup_gfar()

Browse Source 
We're going to split the startup_gfar() into 3 separate functions,
so let's cleanup the code a little bit so that cosmetic changes
won't distract attention from logical ones.

- Remove needless casts (e.g. (struct sk_buff **)kmalloc());
- Turn 'unsigned long vaddr;' into 'void *vaddr', to avoid casting;
- Add new 'struct device *dev' variable as a shorthand for
  '&priv->ofdev->dev' that is used all over the place, also rename
  'struct net_device *dev' to 'struct net_device *ndev';
- Turn printk(KERN_ERR ...) to pr_err(...), which is shorter;
- Don't return bogus -1 (i.e. -EPERM) when request_irq() fails;
- Turn '&priv->regs->' to just '&regs->'.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Anton Vorontsov 2009-10-12 06:00:26 +00:00 committed by David S. Miller
parent a2e2725541
commit ccc05c6e1e
1 changed files with 64 additions and 79 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

143
drivers/net/gianfar.c
View File

@ -925,16 +925,17 @@ void gfar_start(struct net_device *dev)
}
/* Bring the controller up and running */
int startup_gfar(struct net_device *dev)
int startup_gfar(struct net_device *ndev)
{
struct txbd8 *txbdp;
struct rxbd8 *rxbdp;
dma_addr_t addr = 0;
unsigned long vaddr;
void *vaddr;
int i;
struct gfar_private *priv = netdev_priv(dev);
struct gfar_private *priv = netdev_priv(ndev);
struct device *dev = &priv->ofdev->dev;
struct gfar __iomem *regs = priv->regs;
int err = 0;
int err;
u32 rctrl = 0;
u32 tctrl = 0;
u32 attrs = 0;
@ -942,38 +943,34 @@ int startup_gfar(struct net_device *dev)
gfar_write(&regs->imask, IMASK_INIT_CLEAR);
/* Allocate memory for the buffer descriptors */
vaddr = (unsigned long) dma_alloc_coherent(&priv->ofdev->dev,
sizeof (struct txbd8) * priv->tx_ring_size +
sizeof (struct rxbd8) * priv->rx_ring_size,
&addr, GFP_KERNEL);
if (vaddr == 0) {
vaddr = dma_alloc_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size +
sizeof(*rxbdp) * priv->rx_ring_size,
&addr, GFP_KERNEL);
if (!vaddr) {
if (netif_msg_ifup(priv))
printk(KERN_ERR "%s: Could not allocate buffer descriptors!\n",
dev->name);
pr_err("%s: Could not allocate buffer descriptors!\n",
ndev->name);
return -ENOMEM;
}
priv->tx_bd_base = (struct txbd8 *) vaddr;
priv->tx_bd_base = vaddr;
/* enet DMA only understands physical addresses */
gfar_write(&regs->tbase0, addr);
/* Start the rx descriptor ring where the tx ring leaves off */
addr = addr + sizeof (struct txbd8) * priv->tx_ring_size;
vaddr = vaddr + sizeof (struct txbd8) * priv->tx_ring_size;
priv->rx_bd_base = (struct rxbd8 *) vaddr;
addr = addr + sizeof(*txbdp) * priv->tx_ring_size;
vaddr = vaddr + sizeof(*txbdp) * priv->tx_ring_size;
priv->rx_bd_base = vaddr;
gfar_write(&regs->rbase0, addr);
/* Setup the skbuff rings */
priv->tx_skbuff =
(struct sk_buff **) kmalloc(sizeof (struct sk_buff *) *
priv->tx_ring_size, GFP_KERNEL);
if (NULL == priv->tx_skbuff) {
priv->tx_skbuff = kmalloc(sizeof(*priv->tx_skbuff) *
priv->tx_ring_size, GFP_KERNEL);
if (!priv->tx_skbuff) {
if (netif_msg_ifup(priv))
printk(KERN_ERR "%s: Could not allocate tx_skbuff\n",
dev->name);
pr_err("%s: Could not allocate tx_skbuff\n",
ndev->name);
err = -ENOMEM;
goto tx_skb_fail;
}
@ -981,14 +978,12 @@ int startup_gfar(struct net_device *dev)
for (i = 0; i < priv->tx_ring_size; i++)
priv->tx_skbuff[i] = NULL;
priv->rx_skbuff =
(struct sk_buff **) kmalloc(sizeof (struct sk_buff *) *
priv->rx_ring_size, GFP_KERNEL);
if (NULL == priv->rx_skbuff) {
priv->rx_skbuff = kmalloc(sizeof(*priv->rx_skbuff) *
priv->rx_ring_size, GFP_KERNEL);
if (!priv->rx_skbuff) {
if (netif_msg_ifup(priv))
printk(KERN_ERR "%s: Could not allocate rx_skbuff\n",
dev->name);
pr_err("%s: Could not allocate rx_skbuff\n",
ndev->name);
err = -ENOMEM;
goto rx_skb_fail;
}
@ -1019,18 +1014,16 @@ int startup_gfar(struct net_device *dev)
for (i = 0; i < priv->rx_ring_size; i++) {
struct sk_buff *skb;
skb = gfar_new_skb(dev);
skb = gfar_new_skb(ndev);
if (!skb) {
printk(KERN_ERR "%s: Can't allocate RX buffers\n",
dev->name);
pr_err("%s: Can't allocate RX buffers\n", ndev->name);
err = -ENOMEM;
goto err_rxalloc_fail;
}
priv->rx_skbuff[i] = skb;
gfar_new_rxbdp(dev, rxbdp, skb);
gfar_new_rxbdp(ndev, rxbdp, skb);
rxbdp++;
}
@ -1044,44 +1037,39 @@ int startup_gfar(struct net_device *dev)
if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
/* Install our interrupt handlers for Error,
* Transmit, and Receive */
if (request_irq(priv->interruptError, gfar_error,
0, priv->int_name_er, dev) < 0) {
err = request_irq(priv->interruptError, gfar_error, 0,
priv->int_name_er, ndev);
if (err) {
if (netif_msg_intr(priv))
printk(KERN_ERR "%s: Can't get IRQ %d\n",
dev->name, priv->interruptError);
err = -1;
pr_err("%s: Can't get IRQ %d\n", ndev->name,
priv->interruptError);
goto err_irq_fail;
}
if (request_irq(priv->interruptTransmit, gfar_transmit,
0, priv->int_name_tx, dev) < 0) {
err = request_irq(priv->interruptTransmit, gfar_transmit, 0,
priv->int_name_tx, ndev);
if (err) {
if (netif_msg_intr(priv))
printk(KERN_ERR "%s: Can't get IRQ %d\n",
dev->name, priv->interruptTransmit);
err = -1;
pr_err("%s: Can't get IRQ %d\n", ndev->name,
priv->interruptTransmit);
goto tx_irq_fail;
}
if (request_irq(priv->interruptReceive, gfar_receive,
0, priv->int_name_rx, dev) < 0) {
err = request_irq(priv->interruptReceive, gfar_receive, 0,
priv->int_name_rx, ndev);
if (err) {
if (netif_msg_intr(priv))
printk(KERN_ERR "%s: Can't get IRQ %d (receive0)\n",
dev->name, priv->interruptReceive);
err = -1;
pr_err("%s: Can't get IRQ %d (receive0)\n",
ndev->name, priv->interruptReceive);
goto rx_irq_fail;
}
} else {
if (request_irq(priv->interruptTransmit, gfar_interrupt,
0, priv->int_name_tx, dev) < 0) {
err = request_irq(priv->interruptTransmit, gfar_interrupt,
0, priv->int_name_tx, ndev);
if (err) {
if (netif_msg_intr(priv))
printk(KERN_ERR "%s: Can't get IRQ %d\n",
dev->name, priv->interruptTransmit);
err = -1;
pr_err("%s: Can't get IRQ %d\n", ndev->name,
priv->interruptTransmit);
goto err_irq_fail;
}
}
@ -1103,7 +1091,7 @@ int startup_gfar(struct net_device *dev)
if (priv->extended_hash) {
rctrl |= RCTRL_EXTHASH;
gfar_clear_exact_match(dev);
gfar_clear_exact_match(ndev);
rctrl |= RCTRL_EMEN;
}
@ -1119,18 +1107,18 @@ int startup_gfar(struct net_device *dev)
}
/* Init rctrl based on our settings */
gfar_write(&priv->regs->rctrl, rctrl);
gfar_write(&regs->rctrl, rctrl);
if (dev->features & NETIF_F_IP_CSUM)
if (ndev->features & NETIF_F_IP_CSUM)
tctrl |= TCTRL_INIT_CSUM;
gfar_write(&priv->regs->tctrl, tctrl);
gfar_write(&regs->tctrl, tctrl);
/* Set the extraction length and index */
attrs = ATTRELI_EL(priv->rx_stash_size) |
ATTRELI_EI(priv->rx_stash_index);
gfar_write(&priv->regs->attreli, attrs);
gfar_write(&regs->attreli, attrs);
/* Start with defaults, and add stashing or locking
* depending on the approprate variables */
@ -1142,32 +1130,29 @@ int startup_gfar(struct net_device *dev)
if (priv->rx_stash_size != 0)
attrs |= ATTR_BUFSTASH;
gfar_write(&priv->regs->attr, attrs);
gfar_write(&regs->attr, attrs);
gfar_write(&priv->regs->fifo_tx_thr, priv->fifo_threshold);
gfar_write(&priv->regs->fifo_tx_starve, priv->fifo_starve);
gfar_write(&priv->regs->fifo_tx_starve_shutoff, priv->fifo_starve_off);
gfar_write(&regs->fifo_tx_thr, priv->fifo_threshold);
gfar_write(&regs->fifo_tx_starve, priv->fifo_starve);
gfar_write(&regs->fifo_tx_starve_shutoff, priv->fifo_starve_off);
/* Start the controller */
gfar_start(dev);
gfar_start(ndev);
return 0;
rx_irq_fail:
free_irq(priv->interruptTransmit, dev);
free_irq(priv->interruptTransmit, ndev);
tx_irq_fail:
free_irq(priv->interruptError, dev);
free_irq(priv->interruptError, ndev);
err_irq_fail:
err_rxalloc_fail:
rx_skb_fail:
free_skb_resources(priv);
tx_skb_fail:
dma_free_coherent(&priv->ofdev->dev,
sizeof(struct txbd8)*priv->tx_ring_size
+ sizeof(struct rxbd8)*priv->rx_ring_size,
priv->tx_bd_base,
gfar_read(&regs->tbase0));
dma_free_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size +
sizeof(*rxbdp) * priv->rx_ring_size,
priv->tx_bd_base, gfar_read(&regs->tbase0));
return err;
}